In the Beginning contains splendid imagery, including animation and early photomicrography, of all parts of the mammalian reproductive process. At first, the film documents scenes of animal life, including human children, then the film moves into more biologically detailed scenes that include photos and animation of ovulation, fertilization, and cell division. There are several views of biologists dissecting rabbits in order to show the reproductive system, the young in-utero, the placenta, and the umbilical cord. All the while, narration provides clear explanation of the imagery.
